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FLUX.2 klein 4B
Description
FLUX.2 [klein] 4B is a compact open model from Black Forest Labs. One model both generates images from text and edits existing images, including editing with several reference images. It has 4 billion parameters and works in 4 steps. Weights are published on Hugging Face under the Apache 2.0 license, which allows commercial use. The larger FLUX.2 klein 9B is a separate model with a non-commercial license. The author provides an official demo on Hugging Face.
Pros and cons
Pros
- Apache 2.0 license, commercial use allowed
- Generation and editing in one model
- Accepts several reference images
- Fast: 4 steps per image
Cons
- The 9B version of the family has a non-commercial license
Key facts
- License
- Apache 2.0
- Commercial use
- Allowed
- Hardware requirements
- About 13 GB VRAM (per the author)
- Developer
- Black Forest Labs
- Interface languages
- English
- Checked on
- Oct 16, 2026
Editorial score
How strongly the AI Expertise editors recommend this open model for each of its tasks right now, on a 0–10 scale. The score combines output quality, capabilities, ease of launch, license openness and freshness.